Results 21 to 30 of about 1,745 (148)

Distribution modelling for Neotropical freshwater stingrays Potamotrygon brachyura and Potamotrygon motoro (Myliobatiformes, Potamotrygonidae) in the Uruguay River basin. [PDF]

J Fish Biol
Abstract This study aimed to identify geographical distribution patterns of the giant short‐tailed river stingray Potamotrygon brachyura and the motoro stingray Potamotrygon motoro in the Uruguay River basin. Data on presence/absence of stingrays were based on fishers' knowledge accessed by interviews through expeditions in Brazil, Argentina and ...
Pereira DAS, Reis RE, Fontoura NF.
europepmc   +2 more sources

Diet-tissue discrimination factors of three neotropical freshwater fishes and a comparison of the trophic position

Journal of Limnology, 2023
The trophic discrimination factor (TDF) is a key parameter for stable isotope analysis and due to a lack of species-specific TDFs, mean universal values have been used, resulting in uncertainties about the trophic position of species and a call for more
Gislaine Iachstel Manetta, Matheus Maximilian Ratz Scoarize, Driele Delanira-Santos, Patrícia Almeida Sacramento, Vinícius de Andrade Urbano, Evanilde Benedito   +5 more
doaj   +1 more source

River Damming Impacts on Fish Habitat and Associated Conservation Measures

Reviews of Geophysics, Volume 61, Issue 4, December 2023., 2023
Abstract River damming has brought great benefits to flood mitigation, energy and food production, and will continue to play a significant role in global energy supply, particularly in Asia, Africa, and South America. However, dams have extensively altered global river dynamics, including riverine connectivity, hydrological, thermal, sediment and ...
Qiuwen Chen, Qinyuan Li, Yuqing Lin, Jianyun Zhang, Jun Xia, Jinren Ni, Steven J. Cooke, Jim Best, Shufeng He, Tao Feng, Yuchen Chen, Daniele Tonina, Rohan Benjankar, Sebastian Birk, Ayan Santos Fleischmann, Hanlu Yan, Lei Tang   +16 more
wiley   +1 more source

Dynamic Adaptive Environmental Flows (DAE‐Flows) to Reconcile Long‐Term Ecosystem Demands With Hydropower Objectives

Water Resources Research, Volume 59, Issue 7, July 2023., 2023
Abstract This study investigates how environmental flows (e‐flows) can be designed as dynamic operating policies to optimize long‐term economic and ecosystem performance in reservoir systems. The main goal is to provide e‐flow solutions that contribute to better preparedness and flexibility of hydro‐systems to face multiyear stress periods, reducing ...
Ana Paula Dalcin, Guilherme Fernandes Marques, Amaury Tilmant, Marcelo Olivares   +3 more
wiley   +1 more source

Isotopic turnover in polar cod (Boreogadus saida) muscle determined through a controlled feeding experiment

Journal of Fish Biology, Volume 102, Issue 6, Page 1442-1454, June 2023., 2023
Abstract Polar cod (Boreogadus saida) is an important trophic link within Arctic marine food webs and is likely to experience diet shifts in response to climate change. One important tool for assessing organism diet is bulk stable isotope analysis. However, key parameters necessary for interpreting the temporal context of stable isotope values are ...
Amanda Fern Ziegler, Bodil A. Bluhm, Paul E. Renaud, Lis L. Jørgensen   +3 more
wiley   +1 more source

COMPARISON BETWEEN TWO FEEDING RATES AND THREE FEEDING FREQUENCIES FOR HYBRID SURUBIMS REARED IN CAGES

Revista Caatinga, 2018
This study evaluated the effects of feeding frequency and feeding rate on productive performance of hybrid surubims reared in cages with automatic feeding.
JULIANA SVERSUT DE ALEXANDRE BOGIANI, CECÍLIA SILVA DE CASTRO, EDUARDO MIYAMOTO FUKANOKI KUNII, LUCIANO CAETANO DE OLIVEIRA, CLAUDIO ANGELO AGOSTINHO   +4 more
doaj   +1 more source

Sustainable management and improvement of genetic resources for aquaculture

Journal of the World Aquaculture Society, Volume 54, Issue 2, Page 364-396, April 2023., 2023
Abstract Effective genetic management of the ~700 aquatic species cultured globally should be addressed for aquaculture to make a significant contribution towards meeting the UN's Sustainable Development Goals. This article aims to identify the current status and challenges relating to the management of farmed aquatic genetic resources (AqGR) and to ...
A. K. Sonesson, E. Hallerman, F. Humphries, A. W. S. Hilsdorf, D. Leskien, K. Rosendal, D. Bartley, X. Hu, R. Garcia Gomez, G. C. Mair   +9 more
wiley   +1 more source

Sperm morphology and morphometry of neotropical catfishes: Pseudoplatystoma reticulatum, Pseudoplatystoma corruscans, Phractocephalus hemioliopterus, and Hemisorubim platyrhynchos [PDF]

Brazilian Journal of Biology
The objective of this study was to describe the morphological and morphometric characteristics of spermatozoa from four native fish species using a descriptive approach.
N. G. Leite, J. A. Povh, D. P. Streit-Junior, D. H. Siqueira-Silva, L. N. Spica, R. Y. D. Kasai, E. A. Sanches, N. M. Lopera-Barrero   +7 more
doaj   +2 more sources

Digenea in the surubim Pseudoplatystoma corruscans (Spix and Agassiz, 1829) (Siluriformes: Pimelodidae) of the upper São Francisco River, State of Minas Gerais, Brazil

Brazilian Archives of Biology and Technology, 2008
The specimens of surubim, Pseudoplatystoma corruscans (Spix and Agassiz, 1829), an important food fish with high commercial value in the Upper São Francisco River, were collected downstream from the Três Marias Dam, in the municipality of Três Marias ...
Renata de Fátima da Silva Stravalli Corrêa, Marilia de Carvalho Brasil-Sato   +1 more
doaj   +1 more source

Hybrids between Pseudoplatystoma corruscans and P. reticulatum (Siluriformes: Pimelodidae) previously reported in the Upper Paraná River are likely escapes from aquaculture farms: evidence from microsatellite markers

Zoologia (Curitiba), 2016
The production of hybrids of the 'pintado', Pseudoplatystoma corruscans (Spix & Agassiz, 1829) and 'cachara', Pseudoplatystoma reticulatum (Eigenmann & Eigenmann, 1889) in captivity has generated many concerns about the possibility of introduction of ...
Rafael A. Baggio, Caroline B. Moretti, Andréa Bialetzki, Walter A. Boeger   +3 more
doaj   +1 more source